100 MHz Amplitude and Polarization Modulated Optical Source for Free-Space Quantum Key Distribution at 850 nm

TL;DR

This paper presents an integrated optical transmitter capable of 100 MHz repetition rate, emitting customizable amplitude and polarization pulses at 850 nm, optimized for free-space quantum key distribution and space applications.

Contribution

It introduces a compact, low-power, space-qualified integrated photonic transmitter with arbitrary amplitude and polarization control for quantum communication.

Findings

Achieved 100 MHz pulse repetition rate

Demonstrated arbitrary amplitude and polarization modulation

Suitable for satellite quantum communication

Abstract

We report on an integrated photonic transmitter of up to 100 MHz repetition rate, which emits pulses centered at 850 nm with arbitrary amplitude and polarization. The source is suitable for free space quantum key distribution applications. The whole transmitter, with the optical and electronic components integrated, has reduced size and power consumption. In addition, the optoelectronic components forming the transmitter can be space-qualified, making it suitable for satellite and future space missions.